US2025251454A1PendingUtilityA1
Method for estimating a state of charge for a hearing aid
Est. expiryFeb 5, 2044(~17.5 yrs left)· nominal 20-yr term from priority
H02J 7/82H04R 2225/31H04R 25/505G01R 31/3835H04R 25/554G01R 31/378G01R 31/387G01R 31/385G01R 31/3842H04R 25/30H04R 25/305G01R 31/367G01R 31/382
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Claims
Abstract
Disclosed herein are embodiments of methods for estimating a state of charge for a hearing aid comprising a rechargeable battery. The method can include using weighted combinations of different estimated values of the state of charge. Certain examples of determining the first estimated weight uses charging and discharging states and/or different voltage models.
Claims
exact text as granted — not AI-modified1 . A method for estimating a state of charge for a hearing aid comprising a rechargeable battery, the method comprising:
determining a value of the state of charge based on a weighted combination of:
a first estimated value of the state of charge determined using a voltage model and,
a second estimated value of the state of charge determined by tracking a flow of charge or energy of the battery,
wherein the combination of a first weight of the first estimated value and a second weight of the second estimated value correspond to a maximum weight, and wherein determining the first estimated value of the state of charge comprises:
determining whether the battery is in a charging state or a discharging state,
when the battery is in the discharging state, using the voltage model and a battery voltage to determine the first estimated value of the state of charge,
when the battery is in the charging state, using the voltage model and a modelled voltage potential difference between charging and discharging.
2 . The method according to claim 1 , wherein the voltage potential difference is modelled as a voltage increase caused by charge current flowing through a resistor and an additional offset accounting for redistribution effects occurring after charging.
3 . The method according to claim 1 , wherein the first estimated value of the state of charge is determined using the formula:
SoCV
=
{
f_learn
(
Vbat
)
,
if
discharging
f_learn
(
Vbat
-
i_charge
*
R_charge
-
Alpha
*
V_relax
)
,
if
charging
wherein:
SoCV is the first estimated value of the state of charge,
f_learn is the voltage model,
Vbat is the battery voltage,
i_charge is a charge current flowing into the battery,
R_charge is a modelled charge resistance
Alpha is a predetermined value, and
V_relax is another predetermined value, modelling the additional offset.
4 . The method according to claim 1 , wherein the second estimated value of the state of charge is determined using one of the following formulas:
SoCC
(
t
)
=
SoC
(
0
)
+
∫
0
t
i_bat
dt
or
SoCC
(
t
)
=
SoC
(
0
)
+
∫
0
t
i_bat
*
Vbat
dt
wherein:
SoCC is the second estimated value of the state of charge,
SoC(0) is the value of the state of charge after a change from the charging state to the discharging state or moving from the discharging state to the charging state,
i_bat is the battery current,
t is the time since a change of state, and
Vbat is the battery voltage.
5 . The method according to claim 1 , wherein when an ending condition is met, the second weight is decreased towards a minimum weight and/or the first weight is increased towards a maximum weight.
6 . The method according to claim 5 , wherein when a change in state condition is met and the ending condition is not met, the second weight is set to be substantially equal to the maximum weight and/or the first weight is set to be substantially equal to the minimum weight.
7 . The method according to claim 5 , further comprising, when a change in state condition is met and the ending condition is not met:
determining whether the battery is fully charged or not fully charged, if the battery is fully charged, setting the second weight to be substantially equal to the maximum weight, and if the battery is not fully charged, setting the first weight to be substantially equal to the maximum weight.
8 . The method according to claim 5 , wherein when the change in state condition is not met and the ending condition is not met, the second weight is continuously decreased and/or the first weight is continuously increased.
9 . A hearing aid configured to compensate a hearing loss of a user wearing the hearing aid, wherein the hearing aid comprises:
an input unit configured to receive an acoustical signal and convert the acoustical signal into an input signal, a signal processor configured to process the input signal with a hearing loss profile of the user, an output unit configured to emit the processed signal with the hearing loss profile into the ear of the user, a rechargeable battery, and wherein the processor unit is configured to perform the method according to claim 1 .
10 . A system comprising the hearing aid according to claim 9 and a charger configured to charge the rechargeable battery of the hearing aid.
11 . A data processing system comprising a processor and program code means for causing the processor to perform at least some of the steps of the method according to claim 1 .
12 . A computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method according to claim 1 .Join the waitlist — get patent alerts
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